%%
%% The LaTeX Companion, 3ed
%%
%% Example 9-6-11 on page I-718 in "Letter case features".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{99.0pt}

  %!TEX program = lualatex

%  \setlength\parindent{0pt}

%StartShownPreambleCommands
\usepackage{fontspec}
\setmainfont{EB Garamond}
            [ SmallCapsFeatures =
                {Letters={UppercaseSmallCaps,PetiteCaps}} ]
%StopShownPreambleCommands

\begin{document}
\raggedright
Different \textsc{\textit{Faces} Of \textbf{Small
  \itshape Capitals} Followed} By \textit{Further} Text.

\addfontfeature{Letters = SmallCaps}
But Now \textit{Everything} Uses \textbf{Small \itshape Capitals}!
\end{document}
